Jujutsu Kaisen Season 1 Episode 3

Despite leading a completely typical high school life, Itadori Yuji is a boy with extraordinary physical strength. He swallows the Double-Faced Specter's finger and absorbs the Curse into his own soul one day in order to save a buddy who has been under the control of Curses. From that point on, he and the Double-Faced Specter share a single body.